Ken has been a great coach to my kids. He is fantastic when helping my kids swing, constantly reminding my children to close da face. This is great advice. Unfortunately my kids were rather inactive during their time in Kens lessons. They share a lesson with 4 other kids. While one child hits ball to ken, child number 2 sits on a tall chair, child number 3 picks up balls and child number 4 dodders around the tennis court. After 15 minutes the cycle changes and another kid sits on the tall chair etc. If you are lookin for a coach who is good on teaching da swings but doesnt give ur kid much of a hit, ken is gud. If you want ur kids active probably stay away from dis 1.